| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $3,989–$5,245; 2027: Unconfirmed — check official site | Last year's cycle (2026): $7,113; 2027: Unconfirmed — check official site | $10,200 (2027 cycle) |
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| Financial aid | Last year's cycle (2026): Scott Simenas Award (need-based scholarship and stipend): Amount: Unconfirmed — check official site. Preference for students from Boston Public High Schools; no other financial aid is offered.; 2027: Unconfirmed — check official site | Last year's cycle (2026): Need-based tuition scholarship: Amount: Unconfirmed — check official site. Limited and competitive; admitted students apply separately with essay responses.; 2027: Unconfirmed — check official site | Need-based financial aid: Amount: Unconfirmed — check official site. About 40% of students receive aid; average award is 70% of tuition; awards include free or reduced-price gear rental and top packages include flights. (2027 cycle) |
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| Expenses and aid conditions | Last year's cycle (2026): Nonrefundable application fee: $75; Nonrefundable enrollment deposit applied to tuition: Amount: Unconfirmed — check official site; Scott Simenas Award (need-based scholarship and stipend): Amount: Unconfirmed — check official site. Preference for students from Boston Public High Schools; no other financial aid is offered.; 2027: Unconfirmed — check official site | Last year's cycle (2026): Pre-college fee: $780; Optional housing per session: $2,542; Application fee: $50. Non-refundable; waived for applications submitted before the early-bird deadline.; Health insurance fee per session (international students only): $225; Need-based tuition scholarship: Amount: Unconfirmed — check official site. Limited and competitive; admitted students apply separately with essay responses.; 2027: Unconfirmed — check official site | Summer Term 2027 student account deposit: $500. Returned if unused.; Need-based financial aid: Amount: Unconfirmed — check official site. About 40% of students receive aid; average award is 70% of tuition; awards include free or reduced-price gear rental and top packages include flights.; Clarity financial aid application fee: $65. Only for aid applicants; automatically waived below a certain family income, or on request. (2027 cycle) |
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| Stipend or pay | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Eligibility | Grades 10–12 (provider uses rising grades) | Grades 10–12 when applying; check the provider's rules for graduating seniors | Grades 10–12 (provider uses rising grades) |
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| Additional eligibility | Requirement: Open to rising grades 10–12; Requirement: International applicants whose native language is not English must show English proficiency (e.g., TOEFL, IELTS or Duolingo) | Requirement: Open to students currently in grades 10–12 when applying; Requirement: Good academic standing with at least a 3.0 GPA; Requirement: Minimum TOEFL 90, IELTS 7.0 or Duolingo 115 when English is not the main language of instruction at the student's high school; Requirement: International students in on-campus classes need an F-1 visa and at least 6 credits | Ages 14–18; Requirement: Open to rising grades 10–12; Requirement: Willing to spend extended periods (10 days) outdoors in wilderness settings; no previous outdoor experience is required |
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| Session dates or duration | Starts June 20, 2027; Ends August 6, 2027; 2 weeks (2027 cycle) | Catalog terms: 5–8 weeks; 2027: Unconfirmed — check official site | Starts June 27, 2027; Ends July 24, 2027; 4 weeks (2027 cycle) |
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| Format | In person | In person / Online | In person |
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| Housing and supervision | Residential. Supervision and housing details: Unconfirmed — check official site | Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | Boston, MA | Washington, DC | Leadville, CO |
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| Selection and application | Application materials: Personal statement of 500-750 words | Application materials: 300- to 500-word personal statement; One letter of recommendation | Selection: HMI describes a typical cohort of 12-20 students; it does not publish a current applicant count or acceptance rate. Application materials: Summer Term application with two essay questions; Two teacher recommendations (at least one from a core academic teacher); 15-30 minute interview with the admissions team |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-10 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-09Source 5 · checked 2026-10-09 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22 |
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